What would be the growth rate at which no external financing would be required

130 Previous Years Sales Costs Tax rate Assets Current Assets Cash Debtors Inventory Non-Current Assets 1100 Retained Earnings 800 Dividends 0.3 Liabilities/Equity Current Liabilities 400 Creditors Short Term Notes Non-Current Liabilities Debentures PP&E Total Assets 600 1000 500 Owners Equity Retained Profits Ordinary Shares 500 1000